All names: UBV 7227, G107-70A, GJ 275.2 B, Zkh 105, 07307+4810A, USNO 425, WISEA J073047.07+481013.1, G 111-8, WD 0727+48, PM 07271+4818, USNO-B1.0 1381-00227164, G 193-51, ** GIC 75B, ** WNO 49, uvby98 980107070, NLTT 17953, LSPM J0730+4810, TIC 328328649, LHS 230, EGGR 52, USNO 824, G 107-70, G107-70A/B, 2MASS J07304735+4810275, WD 0727+482, LHS 230A, CSI+48-07271, PMSC 07234+4824BC, WDS J07307+4813BaBb, PM J07307+4810, GEN# +9.80107070, WDS J07307+4813B
| Parameter | Unit | Pan-STARRS DR1 | Stilism | Holberg et al. 2016 | Limoges et al. 2015 | Giammichele et al. 2012 | Holberg et al. 2008 | Bergeron et al. 2001 | Bergeron et al. 1997 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 30 47.31 (129) | 07 30 48.98 | |||||||||
| Declination | 48 10 26.61 (83) | 48 11 04.56 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA+DA | DA | ||||
| Effective temperature | [K] | 4934.0 (81) | 4910.0 (105) | 4934.0 (81) | 5020.0 (120) | 4900.0 (80) | |||||
| log(g) | [cgs] | 7.89 (0.02) | 7.86 (0.02) | 7.89 (0.02) | 7.92 (0.02) | 7.35 (0.02) | |||||
| Mass | [M☉] | 0.599 (0.01) | 0.5 (0.01) | 0.51 (0.01) | 0.53 (0.01) | 0.27 (0.01) | |||||
| log(Luminosity) | [L☉] | -4.01 | -4.01 | -4.00 (0.01) | -3.76 (0.01) | ||||||
| Cooling age | [Gyr] | 5.1500 | 4.6800 | 4.6000 (0.2) | 2.0000 (0.04) | ||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(C/H) | |||||||||||
| log(N/H) | |||||||||||
| log(O/H) | |||||||||||
| log(Na/H) | |||||||||||
| log(Mg/H) | |||||||||||
| log(Al/H) | |||||||||||
| log(Si/H) | |||||||||||
| log(P/H) | |||||||||||
| log(S/H) | |||||||||||
| log(Sc/H) | |||||||||||
| log(Ti/H) | |||||||||||
| log(Cr/H) | |||||||||||
| log(Mn/H) | |||||||||||
| log(Fe/H) | |||||||||||
| log(Ni/H) | |||||||||||
| Parallax | [mas] | 90.00 (1) | 90.00 (1) | 90.00 (1) | 90.00 (10) | 90.00 (1) | 90.00 (1) | 83.48 | 86.90 (26) | ||
| Distance | [pc] | 11.11 (0.1) | 11.10 (2) | 11.10 (0.1) | 11.01 | 11.11 (0.1) | 11.11 (0.1) | 11.98 | 11.51 (3) | ||
| Composition | H | H | H | H | H | H | |||||
| Proper motion (right ascension) | [mas/yr] | -224.0 (3) | |||||||||
| Proper motion (declination) | [mas/yr] | -1262.0 (2) | |||||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | DDu | DDu | yes | ||||||||
| B magnitude | 16.24 | 16.24 | 15.63 | 15.61 | |||||||
| V magnitude | 15.26 | 15.26 | 15.26 | 14.65 | |||||||
| R magnitude | 14.73 | 14.73 | 14.12 | 14.40 | |||||||
| I magnitude | 14.24 | 14.24 | 13.63 | ||||||||
| J magnitude | 13.66 | 13.66 | 13.05 | 13.08 (0.02) | |||||||
| H magnitude | 13.42 | 13.42 | 12.81 | 12.84 (0.02) | |||||||
| K magnitude | 13.33 | 13.33 | 12.72 | 12.76 (0.03) | |||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | |||||||||||
| BP magnitude | |||||||||||
| RP magnitude | |||||||||||
| Pan g magnitude | 15.06 (0.0006) | ||||||||||
| Pan r magnitude | 14.48 (0.002) | ||||||||||
| Pan i magnitude | 14.15 (0.002) | ||||||||||
| Pan z magnitude | 14.07 (0.01) | ||||||||||
| Pan y magnitude | 14.03 (0.008) | ||||||||||
| E(B-V) | 0.000 | ||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.